Cefn-grwca, a. crook-backed
Cefn-grwm, a. hump-backed
Cefn-hwrwg, a. hunch-backed
Cefnllif, n. a high flood
Cefnog, a. backed, courageous
Cefnogaeth, n. backing
Cefnogi, v. to back, to encourage
Cefnogiad, n. a backing
Cefnu, v. to back; to turn a back
Ceffyl, n. a horse